In brief
HTML figcaption describes the contents of its parent figure. The figure may be an image, diagram or other self-contained illustration.
Useful to know
HTML figcaption describes the contents of its parent figure. The figure may be an image, diagram or other self-contained illustration. [1]
A caption does not automatically replace suitable image alt text. They can serve different purposes: visible context beneath the figure and a text alternative for essential visual information. Review them together without unnecessary duplication.
Sources
For further detail and to check the information: